Chapter 4 Structure Of System Components; Basic Structure; Mechanical Structure; Mechanical Structures - Brother HL-3450CN Service Manual

CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS
1.

BASIC STRUCTURE

1.1

Mechanical Structures

This laser beam color printer (hereinafter called "Printer") consists of five mechanical
systems; Print, Transfer, Scanning, Paper Transport and Control System. The printer
produces color printing through the interactive operations of these five systems as shown in
Fig.4-1.
(1) Print System
The print system consists of the following 6 (six) functional parts located around the
OPC belt which form a toner image on the OPC Belt.
N
Charger Part
N
Exposure Part
N
Development Part
N
First Transfer Part
N
Discharger Part
N
Cleaner Part
(2) Scanning System
The scanning system consists of the following 2 (two) functional parts which form an
electrostatic latent image on the OPC Belt by scanning it with a laser beam.
N
Scanner Unit
N
Scanner Motor (SCM)
(3) Transfer System
The transfer system consists of the following 3 (three) functional parts and transfers
the toner image formed on the transfer drum onto the page.
N
Transfer Drum
N
Second Transfer Part
N
Drum Cleaner Unit
(4) Paper Transport System
The paper transport system consists of the following 5 (five) functional parts and picks
up paper from the media cassette, separates the paper from the transfer drum and
exits it from the printer body after fusing the toner image on the paper.
N
Media Cassette
N
Transport rollers
N
Paper Discharger
N
Fusing unit
N
Paper Exit
4-3
HL-3450CN SERVICE MANUAL